A plating bubble is trapped air/gas under the plating of the coin (Very common). If it pops, then it will expose the zinc inside and then the coin may begin rotting, hence the name zinc rot. I suggest spending it before the rotting begins.
-CH27
Collector of U.S. Coins, Varieties, and Colonial Coinage
Edited by CoinHunter27
12/06/2019 8:56 pm